Electric locomotive truck



July 26, 1927.

w. M. SHEEHAN ELECTRIC LOCOMOTIVE TRUCK Filed June 1926 2 Sheets-Sheet;

July 26,1927.

W. M. SHEEHAN ELECTRIC LOCOMOTIVE TRUCK 2 Sheets-sheet 2 Filed June 1926 m 7 Tm 7 a H rm W ws m MUM m .1 n4 Q w W 5 5 w h i W :1

Patented July 26, 1927 UNITED STATES.

PATENT OFFICE,

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ELECTRIC LOGOMOTIVE TRUCK.

' a iucauongmea June 9,1926. sw rm; 114,144.

My invention relates to railway rolling stock and consists in an improved truck construction particularly adapted for use under electric locomotives. v i

The object of my invention is to provide a truck frame, or cab underframe; for use w1th gearless or bipolar motors having their armatures wound on the driving axles, the parts preferably being formed integrally and including pole pieces for the motors .and various other elements usually made separately from the frame and assembled therewith. By making a lar e number of elements in one unit,-prefera ly in the form of one piece casting, the labor and expense of assembly is eliminated, the possibility of the loosening of attaching means for separate members and the need for fre uent inspections and repairs is reduced. n addition to these advantages the integral construction produces a more compact structure and one less expensive than a built-up structure. 1

In the accompanyingdrawings which illustion v s Figure 1 is a top view of a frame embodying my invention.

igure 2 is a lon itud-inal vertical section taken on the center ine 22 of Figure 1.

Figure 3 is a side elevation of the frame.

members has pole pieces 7 formed integrally thereon, the end'rails havi pole pieceson their inner faces only, and-t e intermediate cross ties having pole pieces on both faces. Cross tie 5 is shown, as having a single web with reenforcing flan es' 8 and 9 at top and bottom which form brackets for mounting the cab base B and tie plates P, respectively;-

Cross tie 6 is shown as being a box section,

there being transverse elements 10 connecting the'side walls of the cross tie-between-the -pole pieces 7, the sections 10 being of sufficient area to conductrthe ma etlc flux or 5 current from onecpole to the ot er. The'top 'trate a selected embodiment of my inven Y 1 and for the bottom t1e plates respectively.

indicated "at 1-2 to form a; U-shaped connec tion with the websjof the cross ties which reheves manufaet.ur1'ng and servicegstresses.

.Each of-thecross'ties extends inwardly and downwardly belfiw' the level of thwlleel piece ,or side of the frame and its cab base supporting flanges are suitablyconnected with the upper wall of the wheel pieces by arcuate gussetsf 13-. r

The end rail 3 has a radius bar pocket 14 and pin fulcrum elements 15 formed integrallythereon and the opposite end rail 4 has its outer faces provided with abracket 16 formin ment. A orizontal Wall 17 below bracket an articulated connection ele- 16 is adapted to prevent undesirable disen- 1 gagement of the cooperating element of; the ad acent truck. Each of the transverse members of'the frame has integral lugs 18 and 19 forming shear lips for the cab base Other integral'elements of my frame "are the brake lever. fulcrums 20, the dead lever ful- I crums 21, the brake hanger fulcrums 22' and the equalizer .fulcrums 23 which'are alined with the cross ties-and are formed in the outer wall ofthewheel pieces 1 andina rib 25 provided on the inside of the wheel piece in front of the U-shaped bends 12.

Iclaim: v I 3 1. An electric locomotive truck frame transverse member, box-shape in cross sec:

'tion and having outer walls, there eing connections'between said walls adjacentto-said pole pieces of sufficient cross sectional area to conduct the magnetic flux from one of said pole pieces to theothen ole pieces formed on its 2. Av one piececasting comprising an electric locomotive truck frame having box shaped wheel pieces, and a cross tie between said wheel pieces, the inner .walls of said I vwheel pieces having U-shaped bends extending inwardly of the frame to meet said cross a tie.

3. A one piece casting comprising an electric locomotive; truck frame and lncludin wheel pieces, cross ties between said whee pieces adapted to receive a motor frame between them, and pole pieces on said cross ties.

'4. A one piece casting comprising an elec tric locomotive truck frame having integral wheel pieces, pedestals and a cross tie with pole pieces thereon, and equalizer fulcrums on said wheel pieces in'line with said'cross tie.

5. In an electric locomotive truck frame, wheel pieces and end rails connecting said wheel pieces, there being a pole piece formed integrally on the inside face of each of said rails, and integral draft pocket forming elements on the outside of each of said rails.

6. A one-piece cast truck frame for electric locomotiveswith wheel pieces comprising the sides of the frame, a tie member connecting said wheel ces and extending above and below the level of said wheel pieces, the top and bottom of said tie memher having integral bracketswith shear lips formed thereon for mounting and position ing the locomotive cab base and for the truck '7. A one piece casting comprising an electric locomotive truck frame including wheel pieces, pedestals, cross ties, end rails with draft pockets, brake lever and hanger brackets, there being integral pole pieces provided on said cross ties and end rails.

In testimony whereof I hereunto atfii; my signature this 3rd day of June, 1926. i

' \VlLLTAM M. SHEEH AN.

bottom tie plates, respectively. 

